Question

multiple-choice question
when we distribute, we multiply.
when we un-distribute, we ______________.
divide
multiply
subtract

Explanation:

Undistributing (factoring) reverses distribution. Distribution uses multiplication (e.g., $a(b+c)=ab+ac$). Undistracting extracts a common factor, which involves dividing terms by that factor to rewrite the expression (e.g., $ab+ac=a(b+c)$).

Answer:

divide